1 / 24

Handheld Solutions

Handheld Solutions. Toxic Gas Handheld – The Analog Sections . Low Power, Precision Signal Chain. ISL28194/5. ISL88001/2/3. ISL28194/5. ISL12030. ISL28194/5. ISL26132. ICL3238E. ISL28194/5. EL8170/72 ISL28230. ISL6118 /19. Fuel Gauge: ISL6295 Li-Ion charger: ISL9205

hada
Download Presentation

Handheld Solutions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Handheld Solutions

  2. Toxic Gas Handheld – The Analog Sections Low Power, Precision Signal Chain ISL28194/5 ISL88001/2/3 ISL28194/5 ISL12030 ISL28194/5 ISL26132 ICL3238E ISL28194/5 EL8170/72 ISL28230 ISL6118 /19 Fuel Gauge: ISL6295 Li-Ion charger: ISL9205 Charging Safety: ISL9200, ISL9212 ISL21070/80 ISL60002 LDO: ISL80101/A and ISL9021 Buck Converters: ISL8009A and ISL9104

  3. Toxic Gas, Oxygen, Heat Sensors – Analog Front End The Sensors • Combustible Gas Sensors – 3 node Amperometric sensor – Examples: CO, H2, H2S • Working electrode (also called the sensing electrode) is designed to optimize the oxidation or reduction of the toxic gas to be measured. • Reference electrode anchors the working electrode potential. • Counter electrode (EA ) balances the reaction of the working electrode. If the working electrode oxidizes the gas, then the counter electrode must reduce some other molecule to generate an equivalent current. • Oxygen Sensor – Current output Analog Front End Requirements • Low Power Op Amps, Low Bias Current • ISL28194/5 Transimpedance amp for the gas and oxygen sensor, a buffer/driver for the gas sensor, gain amps stages • Low Power Instrumentation Amps • EL8170/72 high gain, high CMRR of heat bead sensor ISL28194/5 ISL28194/5 ISL28194/5 ISL28194/5 EL8170/72 • Heat Bead – Bridge type voltage output

  4. ISL28194/ISL28195: MicroPower, RRIO Op Amp Features • MicroPower • Rail-to-rail Input/Output • Enable pin available Applications • 2 cell alkaline battery powered systems • Window comparators • Threshold detectors • Low power sensors For Precision Alternatives, see ISL28233 or ISL28230 ISL28194 ISL28195

  5. EL8170/EL8172: Instrumentation Amps Performance • Supply Current/Amp : 60µA • Single Supply Operation: 2.4V to 5.5V • Rail-to-Rail Input & Output • CMRR : Typical 110dB • Low Offset Voltage & Bias Current • Bipolar VOS< 150µV, IB< 1.5nA • PMOS VOS< 500µV, IB< 30pA Heat bead VOUT

  6. Toxic Gas Handheld – Power Sections ADC Power : Focus on low Iq and high efficiency parts ISL9021: Wide Vin low Iq single LDO ISL9103/4: Low Iq high efficiency switching regulator In high end models, USB regulation and protection IC can be promoted: ISL80121: 1A ultra low drop out LDO with fixed 5V output Power source can be a stack of alkaline, NiCad batteries, or a Li-ion battery, or even a USB supply. Basically input can be anywhere from 1.8V to 6V. Small power loss is the key as devices need to run for long hours.

  7. ISL9021: Single Low VIN, High PSRR 250mA LDO Typical Application and Why Low VIN & High PSRR is Needed • Description • Single low input voltage, high PSRR LDO capable of delivering up 250mA of continuous current • Features • Wide input dynamic range of 1.5V – 5.5V efficiently operates from buck output • High PSRR at very high frequencies reduces DCDC output ripple and makes it ideal to be used as a buffer to any high switching frequency DCDC. • Very good noise performance (14µVrms @ VOUT = 1.5V) • Output voltage as low as 0.9V • Very small packages 3.7V 1.2V ISL9021 1.8V ISL9103/4 Hi PSRR LDO 1.6x1.6 µTDFN 4-Ball WLCSP Depending on input source, switching regulator at first stage may not be required. Due to the ISL9021’s wide input range, it can operate from a variety of batteries.

  8. ISL28006/ISL28005: Micro-Power, Precision Low/High Side Current Sense Amplifier • Ability to operate rail-rail for both low-side and high-side sensing • Excellent for low ohmic measurements Typical Application: Multiple Output Power Supply • Applications • Low Ohmic Shunt Sense • Power Mgt /Monitors • Power Distribution and Safety • DC/DC, AC/DC Converters • Battery Mgt /Charging • Automotive • Alternative Energy • Portable Applications Precision (ISL28006) and Low Cost (ISL28005 Options

  9. Barcode Scanner – Part 1 5 Q: Do you signal condition the output from the receiving detector with an op amp? 6 • Q: Are you concerned about the noise performance of your power supply? • Solution: ISL80101A • 1A LDO with programmable current limit • Solution: • ISL28x13/ISL28x14 • Low Cost, Low Power, GP Op Amp 4 • Q: How do you drive your motor? Solution: HIP4020 Low voltage Full bridge driver with 0.5A integrated FET. 3 • Q: How much current do you need • from your switching regulator? • Solution: ISL8012 • Low Iq , 2A switching regulator • Q: Do you need a low power • SAR converter? 7 • Solution: ISL267450 • 1 Msps SAR converters • @ 3mW power consumptin 2 • Q: How do you monitor power or sense current? • Solution: • ISL28005/6 • Low Power, Integrated Current sense amplifier • ISL28x33/ISL28x30 • Low Power, Precision Amplifier 1 • Q: What kind of charging circuit is needed for your device?

  10. ISENSEFS= 20A + - ISL2800X Design Example: 20A Max Current; 10V FS Output; G = 100 • Given these: • Full scale sense current (ISENSE FS) = 20A • Full scale output voltage (VOUT FS) = 10V • Current sense amplifier gain (G = 100) • All that is needed is RSENSE to complete the design: • Calculate full scale input voltage (VSENSE FS) = VOUT FS/ Gain = 10V/100 = 0.1V • Calculate RSENSE = VSENSE FS/ ISENSE FS = 0.1V/ 20A = 5mΩ ISL28005 ISL28006 VRS+ 2V to 28V Load VS VSENSE FS= 0.1V RSENSE = 5mΩ VOUT 0V to +10V FS TYPE WSL2512 1W I-sense resistor with PCB copper Kelvin Contacts

  11. Barcode Scanner – Part 2 7 Q: Are you using an external voltage reference for the converter? • Solution: • ISL21080 • Low Cost, Low Power, GP Voltage Reference 8 Q: Does your device get power from a USB port? • Solution: • ISL80121: • 5V out, 1A LDO with programmable current limit to meet USB spec. • ISL6119: • Dual USB port power supply controller with UV lockout and Fault reporting 9 Q: Do you monitor/supervise your power rail(s)? • Solution: • ISL88016 • voltage supervisor with pin selectable voltage trip points • ISL9201: • High integration single cell charger with power presence and EOC indicator • ISL6295: • low voltage fuel gauge

  12. ISL80121: High Performance 1A LDO with Adjustable Current Limit Description • High Performance 2.2V to 6V VIN, single output LDO capable of 1A current drive Features • Designed for accurate current limiting • Very fast load transient response • Tight ±1.8% VOUT accuracy over -40ºC < TJ < 125ºC • High PSRR over full-rated load current • 100μVrms low output noise from 300Hz to 300kHz • Less than 1µA shutdown current (typ) • PGOOD, Enable, Short-Circuit & Reverse Current Protection, and Over-Temperature Shutdown Capability • 10-Ld 3x3 DFN package

  13. ISL80121: Design to Protect Your Load These features are ideal for USB powered applications such as USB Hubs/ports, printers, modems, STBs, PCs, zip drives, external HDs, speakers, VOIP phones, portable patient monitoring devices, DPF, monitors, etc. They can also be used for other types of ports that require current limiting. Protection from unregulated USB source port!

  14. Mobile Smart Device – Part 1 • Q: Are you concerned about the noise performance • of your power supply? 4 • Solution: ISL80102 • 2A LDO with adjustable soft start • Q: Do you provide power to a USB port or does your device get power from a USB port? 3 • Solution: • ISL80121: • 5V out, 1A LDO with programmable • current limit to meet USB spec. • ISL6185: • Dual USB port power supply controller with accurate current limit and reverse current blocking. Q: Do you monitor/supervise your power rail(s)? 2 • Solution: ISL88011 • Dual voltage monitoring with • adjustable power on reset. Q: What kind of charging circuit is needed for your device? 1 • Solution: ISL9230 • High power Li-Ion Battery charger • with iPath management

  15. ISL9230: Charger IC with iPath Description • Full iPath™ management, provides power to the system while simultaneously charging the battery with up to 1.5A. Features • 40mΩ internal iPath™ FET reduces loss when battery is supplying bus. • Autonomous charging and system current control simplifies design effort. • 26V Max VIN with built in OVP at 6.6V to protect battery and system circuits. • Intelligent timeout interval based on charge current prevents premature timeout when system is operational. • Programmable input current limit prevents the source from collapsing during system high current operations.

  16. ISL9230: iPath Management • How does it work? • At given current limit, control core continuously monitors the output voltage. Actions are based on three conditions: • VOUT holds steady, meaning available current is adequate • Deliver needed current to both paths • VOUT starts to drop, meaning available current is not adequate • Reduce ICHG until VOUT stops dropping • VOUT continues to drop to below VBAT level, meaning available current is far below demand • The battery starts providing current to the load instead of charging. C

  17. Mobile Smart Device – Part 2 Q: Do you control the backlight based on ambient light and proximity to save power? 5 • Solution: ISL29028A • Low-power Ambient Light and Proximity Sensor with intelligent interrupt and sleep modes • Solution: ISL29023 • Low-power digital Ambient Light Sensor with Interrupt Function for light sensor-only requirements Q: How much current do you need from your switching regulator? 6 • Solution: ISL8022 • 2A/1.7A dual synchronous buck regulator with PFM mode for higher light load efficiency 7 Q: Do you use voltage references? • Solution: • ISL21080 or ISL21010 • Low Cost, Low Power, GP Voltage Reference • Offers the most variety Vout options in the industry

  18. ISL8022: 2A/1.7A Dual Synchronous Buck Regulator • Description • 2A/1.7A Dual Output, Synchronous Buck Regulator with selectable PFM/PWM mode operation • Features • VIN Range: 2.7V to 6V • VOUT Range:0.6V to Vin • 12 Ld 4x3 DFN Package • 2A:1.7A Guaranteed Output Current per Channel • 180° Out-of-Phase Operation • Reduces Filter requirements • Selectable Forced PWM & PFM Mode (Power Save Mode) • Synchronization to External Clock – Up to 4MHz • Independent EN for both Channels and Single PGOOD • Current Mode Control with Internal Compensation • Start-up in Pre-Biased Load

  19. ISL29028A: Low Power ALS & Proximity Sensor with Intelligent Interrupt and Sleep Modes • Features • Works under all light sources • Dual ADC architecture • Ambient Light Sensing • Ideal light sensor response • Proximity Sensing • 850nm and 940nm LED compatible • Ambient IR noise cancellation • Intelligent and Flexible Interrupts • Independent ALS/Prox interrupt thresholds • Selectable persist control • Ultra Low Power • 138μA (Typ) including IR LED current • Easy to Use • Set registers; wait for interrupt • I2C (SMBus compatible) output • Small package - 2.0x2.1x0.7

  20. ISL29023: Ultra Low Lux Digital ALS • 4 Gain selectable ALS ranges • G1: 0.015 to 1,000Lux 65counts/Lux! • G2: 0.06 to 4,000Lux • G3: 0.24 to 16,000Lux • G4: 0.96 to 64,000Lux • Low power (<65µA) • <1µA in Shutdown • 16-bits output resolution • Ideal ALS spectral response • Flicker and noise rejection • Temperature compensated • ALS interrupt pin • Hi/Lo Thresholds • 2.0 x 2.1 x 0.7mm ODFN-6L

  21. E-Power Meter 1 Q: How do you monitor power or sense current? • Solution: • ISL28005/6 • Low Power, Integrated Current sense amplifier • ISL28133/ISL28130 • Low Power, Precision Amplifier 2 Q: Are you using an external voltage reference for the µP? • Solution: ISL21080 or ISL21010 • Low Cost, Low Power, GP Voltage Reference • Q: Are you concerned about the noise performance of your power supply? 3 • Solution: ISL9007 • 400mA High PSSR LDO • with short circuit protection Q: Do you control the backlight based on ambient light and proximity to save power? 5 • Solution: • ISL29028A • Low-power Ambient Light and Proximity Sensor with intelligent interrupt and sleep modes • ISL29023 • Low-power digital Ambient Light Sensor with Interrupt Function for light sensor-only requirements Q: How much current do you need from your switching regulator? 4 • Solution: ISL8088 • 0.8A/0.8A dual synchronous • buck regulator with PFM • mode and soft stop

  22. ISL8088: High Efficiency Dual Buck Regulator • Description • 800mA, dual Output, Synchronous Buck Regulator with selectable PFM/PWM mode operation. • Features • Vin Range:2.7V to 6V • Vout Range: 0.6V to Vin • 800mA Guaranteed Output Current per Channel • 180° Out-of-Phase Operation • High Switching Frequency – 2.25MHz • Selectable Forced PWM and PFM Mode (Power Save Mode) • Synchronization to External Clock – Up to 4MHz • Independent EN and PGOOD for both Channels • Current Mode Control with Internal Compensation • Start-up in Pre-Biased Load • 12 Ld 4x3 DFN Package Note: Pin-to-Pin Compatible with LTC3407-2

  23. ISL9110/2: 1A Synchronous Buck-Boost Regulator • Features • Seamless Transition from Buck Boost • Peak Current of 2.0A for each MOSFET • Input battery range of 1.8V to 5.5V • Fully Synchronous in any Operating Mode • Adjustable Output Voltage down to 0.8V • High Switching Frequency • Internal Digital Soft Start • Battery monitor • Pulse Frequency Modulation (PFM) for Light Load • Over Current Protection and Thermal Shutdown • Industrial Temperature Range • Tiny Thermally Enhanced QFN Lead-Free Package

  24. Intersil

More Related